Coherence measurements of supercontinuum source based on a fiber laser and highly nonlinear dispersion shifted fiber

Hoseong Song, Young Jae Kim, Dong Uk Kim, Woosub Song, Dug Young Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We constructed a passively mode-locked Er-doped fiber laser (PML-EDFL). It generates ∼ 1.3 ps pulses at a repetition rate of 12 MHz with an average output power of 0.7 mW. These pulses are amplified in a short Er-doped fiber amplifier (EDFA) which is composed of low nonlinearity EDF. The average power of amplified pulse is about 15 mW. And its pulse width is about 880 fs. An all-fiber supercontinuum (SC) is generated by putting the amplified fiber laser pulse at the wavelength of 1. 56 μm into the highly nonlinear dispersion shifted fiber (HN-DSF) whose zero dispersion wavelength is 1.537 μm and nonlinear coefficient is about 10.5/W/km at the input wavelength. The polarization state of the generated SC spectra is well defined such that it can be properly controlled by the polarization controller. By using a delayed pulsed method, we report an experimental study of the coherence of SC spectra generated through a HN-DSF. In this paper, the strong dependence of the spectral coherence on the HN-DSF length is observed experimentally. And optimal conditions for obtaining wide SC with high coherence are investigated in detail. We believed that our proposed all-fiber laser based SC source with high coherence has many important applications in recently developed frequency-domain measurement techniques such as optical coherence tomography (OCT), optical frequency domain imaging (OFDI), optical frequency domain reflectometry (OFDR) and their instrumentation.

Original languageEnglish
Title of host publicationFiber Lasers IV
Subtitle of host publicationTechnology, Systems, and Applications
Publication statusPublished - 2007
EventFiber Lasers IV: Technology, Systems, and Applications - San Jose, CA, United States
Duration: 2007 Jan 222007 Jan 25

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherFiber Lasers IV: Technology, Systems, and Applications
Country/TerritoryUnited States
CitySan Jose, CA

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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